We have learned that heat of combustion increases as we increase the number of carbons in a structure. For noncyclic compounds with the same number of carbons, branching lowers the heat of combustion. For cyclic compounds with the same number of carbons, any type of strain increases the heat of combustion. Choose the compound with the highest heat of combustion: O methylcyclopentane O cyclohexane cis-1,3-dimethylcyclobutane cis-1-ethyl-2-methylcyclopropane

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Alkanes and Cycloalkanes

Alkanes are saturated organic compounds which are made up of C and H atoms. Alkanes have the general formula of CnH2n+2. Alkane contains sp3 hybridized carbon atoms with four sigmas (σ) bonds & every hydrogen atom is connected with one of the carbon atoms. The size of the alkane could be determined by the number of carbon atoms located in it.